Northern suburbs grass fire deliberate

The grass fire was in a park in Uley Road at Elizabeth Downs, just before 1:00am.

It was quickly put out.

There are 80 police patrols on fire watch today, visiting known and suspected arsonists and monitoring likely fire hot-spots.

Extreme heat is forecast across South Australia and schools on the west coast and lower Eyre Peninsula have cancelled lessons because of the fire risk to students if they had travelled to and from school.